{"id":"F2013L01332","name":"AD/CL-600/36 Amdt 1 - Elevator Flutter Damper Shear Pins","slug":"ad-cl-600-36-amdt-1-elevator-flutter-damper-shear-pins","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":91179,"registerId":"commonwealth-F2013L01332-current","compilationNumber":null,"startDate":"2026-04-02","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"Bombardier (Canadair) CL-600 (Challenger","sectionType":"division","heading":"Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes","content":"### Bombardier (Canadair) CL-600 (Challenger) Series Aeroplanes\n\n```html\n

AD/CL-600/36 Amdt 1

Elevator Flutter Damper Shear Pins

14/2013

Applicability:

Model CL-600-2B19 “Regional Jet” aircraft, serial numbers 7003 through 7357.

Requirement:

1. For aircraft serial number 7003 through 7142, and 7144:

Install new shear pins part number 601R24063-31/S in accordance with paragraph 2, Accomplishment Instructions, Part A of Bombardier Service Bulletin (SB) 601R-27-100, dated 22 December 1999.

Upon accomplishment of the above requirement, the additional first flight of the day checks of the elevator control system as described in TR RJ/68-1, dated 15 February 2000, are no longer required and TR RJ/68-1 can be removed from the Aircraft Flight Manual.

2. For aircraft serial number 7143, and 7145 through 7357:

Review the aircraft maintenance logbook or records in accordance with paragraph 2, Accomplishment Instructions, Part B of Bombardier SB 601R-27-100, to determine if any elevator flutter damper shear pins have been replaced since aircraft delivery.

If no elevator flutter damper shear pins have been replaced or if the shear pins have been replaced with part number 601R24063-31/S, no further action is required.

3. If it cannot be verified that new elevator flutter damper shear pins part number 601R24063-31/S were installed, accomplish the following:

a. Insert a copy of TR RJ/68-1 into the Aircraft Flight Manual and advise the flight crew of additional first flight of the day checks of the elevator control system as described in TR RJ/68-1.

b. Install new shear pins part number 601R24063-31/S in accordance with paragraph 2, Accomplishment Instructions, Part C of SB 601R-27-100.

\n```\n\n| | Upon accomplishment of the requirements of Requirement 3(b), the additional first flight of the day checks of the elevator control system, as described in TR RJ/68-1, are no longer required and TR RJ/68-1 can be removed from the Aircraft Flight Manual. |\n| ----------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |\n| | Note: Transport Canada AD CF-2000-10 refers. |\n| Compliance: | 1. Before 14 April 2001.2. Within 14 days after 13 July 2000.3. a. Within 30 days after 13 July 2000.3. b. Before 14 April 2001. |\n| | This Amendment becomes effective on 19 July 2013. |\n| Background: | Three cases of premature failure of the improved elevator flutter damper shear pins, installed in accordance with Transport Canada AD CF-94-21R1, have been reported. An investigation revealed that the failed shear pins did not meet the design specifications due to a quality control problem. This Directive requires replacement of the elevator flutter damper shear pins to restore their original certified fatigue life.Amendment 1 of this airworthiness directive is issued to correct a typographical error in the serial number range of aircraft listed in Requirement 1. This amendment makes no changes to the technical requirements and the original compliance dates remain unchanged.The original issue of this airworthiness directive became effective on 13 July 2000. |\n\n![HIGGINS_M](image.001.png) \nMike Higgins \nDelegate of the Civil Aviation Safety Authority\n\n1 July 2013","sortOrder":0},{"sectionNumber":"AD/CL-600/36 Amdt 1","sectionType":"part","heading":"AD/CL-600/36 Amdt 1","content":"## AD/CL-600/36 Amdt 1","sortOrder":1},{"sectionNumber":"Elevator Flutter Damper Shear Pins","sectionType":"part","heading":"Elevator Flutter Damper Shear Pins","content":"## Elevator Flutter Damper Shear Pins","sortOrder":2},{"sectionNumber":"14/2013","sectionType":"part","heading":"14/2013","content":"## 14/2013","sortOrder":3}],"analysis":{"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"Amendment 1 corrects a typographical error in the serial-number range in Requirement 1; it makes no changes to the technical requirements or compliance dates. The directive's operational scope and mandated actions remain as originally issued (Requirements 1–3)."},"complexity_factors":["Multiple serial-number cohorts with different mandatory actions (Requirement 1 applies to S/N 7003–7142,7144; Requirement 2 to S/N 7143,7145–7357; Requirement 3 covers unverifiable cases)","Three compliance pathways: mandatory installation, records review/verification, or temporary AFM insertion plus subsequent installation (Reqs 1–3)","References to external documents and procedures (Bombardier SB 601R-27-100 Parts A–C; TR RJ/68-1; Transport Canada AD CF-2000-10)","Several staggered compliance deadlines (within 14 days, within 30 days, and before 14 April 2001) increasing scheduling friction","Administrative steps required: maintenance logbook review, AFM amendment/crew notification, and maintenance action recording","Technical action constrained to a specific part number (`601R24063-31/S`) and prescribed accomplishment instructions (limits contractor/engineer discretion)","Background quality-control root cause limits engineering debate but requires supply of correct replacement parts","Amendment corrects a typographical serial-number error only (no change to technical requirements) which may require operators to re-check applicability"],"plain_english_summary":"This directive requires operators of Bombardier CL-600-2B19 aeroplanes (serial numbers 7003–7357) to verify or replace elevator flutter damper shear pins with part number `601R24063-31/S` per the Bombardier Service Bulletin; once done, the extra first-flight checks in `TR RJ/68-1` can be removed. It responds to reported premature pin failures traced to a quality-control defect. Operators must inspect records, amend the Aircraft Flight Manual if necessary, and pay for parts and labour under the deadlines in Requirements 1–3."},"kimi_summary":{"content_quality":"ok","complexity_score":3,"scope_assessment":{"changed":false,"description":"This is Amendment 1 to an existing Airworthiness Directive. The amendment explicitly states it makes no changes to technical requirements or compliance dates — it only corrects a typographical error in serial number ranges. The scope remains exactly as originally intended in 2000."},"complexity_factors":["Multiple serial number ranges with different requirements (7003–7142/7144 vs 7143/7145–7357)","Conditional logic: different actions required depending on maintenance history (whether pins were previously replaced)","Cross-references to external technical documents (Bombardier Service Bulletin 601R-27-100, Temporary Revision TR RJ/68-1)","Nested requirements: Requirement 3 has sub-requirements 3(a) and 3(b)","Multiple compliance deadlines (before 14 April 2001, within 14 days after 13 July 2000, within 30 days after 13 July 2000)","Technical aviation terminology requiring domain knowledge (flutter damper, shear pins, Aircraft Flight Manual)"],"plain_english_summary":"This CASA Airworthiness Directive mandates replacement (or verification) of elevator flutter damper shear pins on Bombardier CL-600-2B19 regional jets (s/n 7003–7357) after three premature failures from a manufacturing defect that could cause elevator flutter and loss of control. Operators of affected aircraft must comply with replacement or records checks and interim inspections. Amendment 1 (2013) only corrects a serial-number typo; the safety requirements and deadlines are unchanged."},"flash_summary_failed":{"failed":true,"reason":"A positive credit balance is required for all requests, including BYOK, so fallback providers remain available. Add credits at https://vercel.com/d?to=%2F%5Bteam%5D%2F%7E%2Fai%3Fmodal%3Dtop-up to continue.","source":"analysis-cron"}},"importantCases":[],"_links":{"self":"/api/acts/ad-cl-600-36-amdt-1-elevator-flutter-damper-shear-pins","history":"/api/acts/ad-cl-600-36-amdt-1-elevator-flutter-damper-shear-pins/history","analysis":"/api/acts/ad-cl-600-36-amdt-1-elevator-flutter-damper-shear-pins/analysis","conflicts":"/api/acts/ad-cl-600-36-amdt-1-elevator-flutter-damper-shear-pins/conflicts","importantCases":"/api/acts/ad-cl-600-36-amdt-1-elevator-flutter-damper-shear-pins/important-cases","documents":"/api/acts/ad-cl-600-36-amdt-1-elevator-flutter-damper-shear-pins/documents"}}